package com.study.cloudAlibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.study.cloudAlibaba.service.PaymentFeignService;
import com.study.springcloud.entities.CommonResult;
import com.study.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author lzc
 * @date 2022/7/28 17:18
 */
@RestController
//@Slf4j
public class CircleBreakerController {
    public static final String SERVEICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    @SentinelResource(value = "fallback",fallback = "handleFallback",blockHandler = "handleBlock")
    public CommonResult<Payment> fallback(@PathVariable Long id){
        CommonResult<Payment> result = restTemplate.getForObject(SERVEICE_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4) {
            throw new IllegalArgumentException("非法参数异常");
        }else if (result.getData() == null){
            throw new NullPointerException("该id没有对应记录，空指针异常");
        }
        return result;
    }

    //普通异常处理方法
    public CommonResult handleFallback(@PathVariable Long id,Throwable e){
        Payment payment = new Payment(id, "null");
        return new CommonResult<>(
                444,
                "兜底异常handleFallback！！exception内容="+e.getMessage(),
                payment);

    }

    //sentinel异常处理方法
    public CommonResult handleBlock(@PathVariable Long id, BlockException e){
        Payment payment = new Payment(id, "null");
        return new CommonResult<>(
                555,
                "handleBlock-sentinel限流,无此流水: blockException  "+e.getMessage(),
                payment);
    }

    //***********************************************************

    @Resource
    private PaymentFeignService paymentFeignService;

    @GetMapping(value = "/consumer/feignPayment/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentFeignService.paymentSQL(id);
    }
}
